Rotary ventilator



Oct. 23, 1934. J. BOLTON ROTARY VENTILATOR 2 Sheets-Sheet 1 Filed Feb.2'7. 1932 )NVENTOR A 1: to 1-11. ej

0d. 23, 1934. J. BOLTON 1,977,934

ROTARY VENTILATOR Filed Feb. 27. 1932 2 Sheets-Sheet 2 IINVENTOR Q 5QJose lmoet A ttorney Patented Oct. 23, 19 34 BS FATE NT osF cEROTARYVENTILATOR Joseph Bolton, Windsor, Ontario, Canada ApplicationFebruary 27. 1932,=Serial N0. 595,623 s Claims. (01. as-42) Thisinvention relates to improvements in a rotary ventilator, itsprimar'ywobject being to provide a wind driven rotary ventilator havingadded means of suction inside the ventilator pipe thereby giving greaterexhausting capacity.

A further object is to provide such. a ventilator" having nonfrictionalbearings making the device very sensitive to the slightest movement ofair' With these and other objects in view the invention consists in thenovel construction and 151 arrangement of parts as hereinafter morespecifically set forth, claimed and shown in the accompanying drawingsand in which:-

Fig. 1 is a general exterior view of the improved rotary ventilator.

Fig. 2 is a sectional elevation through the same.

Fig. 3 is a plan view of a plate with a circular hole therein.

Fig. 4 is a rear view of the propeller vane and 25. suction blade.

Fig. 5 is a view looking straight at the vane as it will appear whenassembled on the ventilator.

Fig. 6 is a diagrammatic view on the line 6-6 30; of Fig. 5 showing howthe suction blades are secured in the seam of the vane.

Fig. 7 is a detailed sectional view showing the bearings and means oflubrication.

Fig. 8 is a sectional view on the line 8-8 of '35 Fig. 7.

Fig. 9 is a section taken on line 9-9 of Fig. 2. Referring more indetail to the drawings in which similar reference characters designatecorresponding parts throughout the several views 40; it will be seen theinvention comprises a sheet metal pipe 10 being the stationary base forthe ventilator, a steel center non-rotatablerod or shaft 11 is centrallysupported in the stationary base 10 by the brace members 12 and the g5;angularly disposed brace members 13 riveted thereto. Shaft sockets 14are secured to the said brace structure which thus forms a rigid supportand prevents any vibration of the shaft as the ventilator revolves aboutthe same.

The revolving part of the ventilator comprises a circular metal band.15, a circular plate 16 having a centrally disposed circular. openingtherein and a plurality of smaller orifices 17, symmetrically arrangedaround the center thereof,

.55 as more clearly shown in Fig. 3. The propeller vanes 18 are formedfrom strips of metal twisted longitudinally so that their upper ends lieflat on top of the plate 16, to which they are secured by rivets orother suitable means, and their lower ends arei'disposed substantiallyat right angles to'the band 15. The upper and lower portions of theinner edge of the vanes are angularly disposed to each other and thelower portion of the edge is bent to lie flat against theband 15.towhich it is secured by rivets orother suitable means. The inner edge ofthe vanes is formed with a raised seam 19 bent back upon itself whichacts. as a stop or gutter for rain or snow and secured in the seam arethe suction blades 20 and 21. The outer edge of the vanes is curvedlongitudinally having a bead 23 formed along the same and adjacent thebead is a groove 22 which improves the appearance or" the vanes and addsto their strength.

In Fig. 5 the lip 24 of the suction blade is shown bent at an angle thesaid lip cuts the air inside the ventilator as the said ventilatorrevolves and causes a suction. The suction blades 20 and 21 are made intwo sizes, the larger one 20' and the smaller one 21 and thereforerevolve in a larger and smaller radius respectively about the axis. Theyare secured alternately large and small to the propeller vanes, andassist the said vanes to hold their form by being inserted in the raisedseam 19 and soldered or riveted therein. A circular metal pipe 25 actsas a holder for the bearings 26 and. 27. Bearing member 26 comprises aball socket 28 and a lubricant reservoir 29 with a small drip duct 30therebetween and is secured into position in the pipe 25 by a rivet 31which also secures the angle members 32 to the said pipe. The bearing2'7 is secured in the pipe 25 by a screw 33. A steel ball 34 ispositioned on the ball socket 28 between the top of the steel shaft 11and a circular steel washer 35 having a small hole therein permittingthe lubricant to pass from the drip duct 30 to the steel ball 34 and ondown the shaft to the bearing 27. A drip cup 36 is secured to the shaft11 below the pipe 25 and closes the lower end of same to exclude dustetc., from the bearings. This drip cup catches the superfluous lubricantwhich passes out, through a small drain pipe 37. A circular stop 38secured on the shaft by a screw 39 prevents the ventilator from beingremoved from the top of the shaft.

A circular plate 40 having an orifice therein and a depending flangethereon is secured to the pipe 25. A number of small symmetricallyspaced orifices are provided in the same. Light rectangular band irons41 or steel wires, extend radially from the said orifices tocorresponding orifices in the circular band 15 and from thence extendupwardly to connect to the previously mentioned orifices in the plate16. These bands or wires 41 hold the band 15 at an even distance aroundthe central shaft and keep the ventilator running true around the base10, and also support the circular band 15 thus preventing any sagging ofthe ventilator vanes. 1

A conical shaped member 42 surmounts the ventilator forming a closurefor the lubricant reservoir and adding to the artistical appearance ofthe ventilator. A small pipe 43 having a stop per for the same providesmeans of inserting lubricant in the reservoir 29.

It is believed that the construction and advantages of the structureshown may be apparent from the foregoing paragraphs taken in conjunctionwith the accompanying drawings without further detailed description.

While thepreferred embodiment of the invention has been disclosed it isunderstood that minor changes in the details of construction,combination and arrangement of co-operating elements may be resorted towithin the scope of what is claimed without departing from the spirit ofthe invention.

I claim:

1. A rotary ventilator of the type described comprising a plurality ofradially extending vanes, transversely and longitudinally curved, therear longitudinal edges of the vanes being bent outwardly and thenreversely to provide a fold, suction blades adapted to be secured in thefold of said vanes and project inwardly from the rear edges of thevanes, the free edges of said suction blades having an angularly bentlip, means supporting the upper ends of said vanes and means supportingthe lower ends of said vanes.

} 3. A rotary ventilator comprising a circular metal base, anon-rotatable shaft rigidly secured in the center of said base andextending upwardly therefrom, a tubular casing rotatably mounted on saidshaft having bearings at its upper and lower ends to receive said shaft,a circular metal band, radial members securing said band to said casing,a circular plate mounted on the upper end of said casing, propellervanes secured to said circular band and said circular plate andextending radially therefrom, said vanes being transversely andlongitudinally curved, the rear longitudinal edges of the vanes beingbent outwardly and then reversely to provide a fold and suction bladesadapted to be secured in the folds of said vanes and project inwardlyfrom the rear edges of said vanes.

JOSEPH BOLTON.

